I just got randomly logged out earlier today and couldn't log back in until now. I thought I was somehow the cause. First thing I saw when this happened was the gray MLP Arena theme and was like I knew I hadn't logged out and noticed my browser said the site wasn't secure. At least it's back to normal now.

I got logged out too, had to try to keep logging in until it actually worked.

It took me all evening to get logged in. Couldn't log in on my phone, on Firefox, using Edge (which shows how much I wanted to get in, I despise that browser). It only worked once I opened a private session in Firefox. Once I was able to get in through the private session, it let me log in during a regular Firefox session.